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The Ecological and Morphological Characteristics of Microorganisms in Lesnaya Lamba (Karelia)
Author(s) -
Dubinina Galina A.,
Kuznetsov Sergei I.
Publication year - 1976
Publication title -
internationale revue der gesamten hydrobiologie und hydrographie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.524
H-Index - 52
eISSN - 1522-2632
pISSN - 0020-9309
DOI - 10.1002/iroh.19760610102
Subject(s) - phototroph , microorganism , bacteria , algae , biology , vacuole , botany , photosynthesis , ecology , paleontology , biochemistry , cytoplasm
This paper contains the results obtained in the investigations of morphology, ultrastructure and vertical distribution of microorganisms in a stratified lake, Lesnaya Lamba, Karelia. The culture of Ochrobium tectum (PERF.) was produced for the first time, and the bacterial nature of this organism was shown by investigating its ultrathin structure. The presence of gaseous vacuoles was also revealed, which explains the migrational ability of ferritized cells. Several new microorganisms were detected, including the filamentous photosynthetic green bacterium Chloronema giganteum (nov. gen. nov. sp.), a consortium of a new symbiotic form of green bacteria named Chloroplana vacuolata , formerly unknown tiny purple bacteria and blue‐green algae Gloeocapsa , oxidizing iron. It was revealed that more than half of the bacterio‐plankton in the bottom layer possess gaseous vacuoles; they are represented by various morphological forms. The vertical distribution of iron bacteria — Siderocapsa (Arthrobacter), Ochrobium, Siderococcus and other species is regulated according to ecological niches by the concentration of oxygen and iron, and, in phototrophs, by the amount of light and the presence of a certain type of bacteriochlorophyll. All in all, the distribution of nine species of phototrophic bacteria in the lake is described.